National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

79°F

26°C

Humidity 85%
Wind Speed S 6 mph
Barometer 30.06 in (1017.1 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 8 Aug 11:56 pm CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: Partly cloudy, with a low around 75. South wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 97. Heat index values as high as 104. Light south southwest wind becoming south southeast 5 to 10 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 76. Southeast wind 5 to 10 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 97. Heat index values as high as 105. Light south wind becoming south southeast 5 to 10 mph in the morning.

    High: 97 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 75. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 97. Heat index values as high as 104. Light south southwest wind becoming south southeast 5 to 10 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 76. Southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 97. Heat index values as high as 105. Light south wind becoming south southeast 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 100. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 101. South wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 76. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 77.
Friday
Mostly sunny and hot, with a high near 101.
Friday Night
Mostly clear, with a low around 77.
Saturday
Mostly sunny and hot, with a high near 99.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
12:42 am CDT Aug 9, 2026
Forecast Valid:
12am CDT Aug 9, 2026-6pm CDT Aug 15, 2026
 
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